JP6827606B2 - Maintenance plan generator, maintenance plan generation method and maintenance plan generation program - Google Patents

Description

The present invention relates to a technique for assisting in the generation of a maintenance plan for a product using parts that have not been used.

At the time of product design, the range of variation in the life of each component is predicted, and the maintenance cycle is set so that the failure rate is below a certain level. The maintenance cycle is a cycle in which maintenance work such as inspection and parts replacement is performed.
This method has an advantage that the theoretical failure probability can be kept below a certain level only by examining in advance. However, this method requires setting a maintenance cycle that is significantly shorter than the center of the lifetime distribution. In particular, if the failure rate is approached to 0, the maintenance cycle becomes very short, and the parts cost and the replacement work cost become high.

Some methods are also used to extend the cycle without increasing the failure rate by extracting the environmental information that affects the failure rate and setting the cycle according to the environmental information.
This method is effective when the relationship between the environmental information and the failure occurrence rate is clear and the environmental information can be acquired accurately. However, a sufficient effect cannot be obtained when the relationship between the environmental information and the failure occurrence rate is not clear and when the environmental information changes during operation.

Under such circumstances, with the evolution of remote monitoring technology and data analysis technology, attention has been focused on state-based maintenance technology. The condition standard maintenance technology is a technology that grasps the deterioration state of each part by remote monitoring, predicts the time when a failure occurs, and performs maintenance work immediately before the failure occurs. If the accuracy of state grasping and prediction is high, the maintenance cycle can be made to substantially match the life of each component. By utilizing the state-based maintenance technology, it is possible to set a maintenance cycle that can avoid the occurrence of failures and reduce the amount of work.
However, in order to predict the time of failure occurrence in the state-based maintenance technology, it is necessary to acquire a large amount of data about the situation at the time of the occurrence of the target event and the process up to the occurrence of the event.

Patent Document 1 describes a technique for generating a maintenance plan for a plant. In Patent Document 1, the reliability of each part is calculated based on the failure rate and the elapsed time from the last inspection, and the reliability of all the target parts can always be secured as a standard, and the cost is the minimum. It is stated that a maintenance plan will be generated.

Japanese Unexamined Patent Publication No. 2011-6008

In buildings and condominiums with normal specifications, elevators consisting of only standard parts are installed. On the other hand, in buildings with special designs, office buildings with high added value, and high-class accommodation facilities, elevators with special sizes or special designs are installed. May occur. In addition, an elevator or the like configured by using special parts may be installed in order to interlock with an external system. Such special parts are designed and introduced so as to ensure sufficient safety, assuming regular parts replacement. However, since the number of elevators used for special parts is small, it is difficult to grasp the variation in life, and it is difficult to apply the condition standard maintenance technology.

Maintenance work is performed on both standard and special parts. Therefore, if the cycle requiring maintenance work for special parts is shorter than the cycle requiring maintenance work for standard parts, work is performed due to the existence of special parts, such as visiting only for maintenance work of special parts. The amount will be large. If the maintenance cost related to this amount of work is reflected in the maintenance price, the burden of maintenance service for elevators with special parts will increase.

An object of the present invention is to make it possible to appropriately generate a maintenance plan for a product in which special parts are used.

The maintenance plan generator according to the present invention is
For standard parts that have been used more than the standard among the component parts that make up the product, a standard cycle identification unit that specifies the maintenance work cycle that achieves the standard maintenance level as the standard cycle, and
For special parts other than the standard parts among the component parts, a special cycle specifying unit that specifies the cycle of maintenance work that realizes the maintenance level as a special cycle, and
When remote maintenance is introduced for the special part when the special cycle specified by the special cycle specifying unit is shorter than the standard cycle specified by the standard cycle specifying unit. An extension cycle specifying unit that specifies the maintenance work cycle that achieves the maintenance level as an extension cycle,
It includes a maintenance plan generation unit that generates a maintenance plan based on the standard cycle, the special cycle, and the extension cycle specified by the extension cycle identification unit.

In the present invention, when the special cycle is shorter than the standard cycle, the cycle of maintenance work that realizes the maintenance level when remote maintenance is introduced for the special part is specified as the extension cycle. Then, a maintenance plan based on the standard cycle, the special cycle, and the extension cycle is generated. This makes it possible to appropriately generate a maintenance plan for products using special parts.

The block diagram of the maintenance plan generation apparatus 10 which concerns on Embodiment 1. FIG. The figure which shows the example of the special part which concerns on Embodiment 1. FIG. The figure which shows the example of the special part which concerns on Embodiment 1. FIG. The flowchart of the whole process of the maintenance plan generation apparatus 10 which concerns on Embodiment 1. FIG. The figure which shows the example of the remote maintenance which concerns on Embodiment 1. FIG. The flowchart of the standard period specifying process which concerns on Embodiment 1. The explanatory view of the cycle of maintenance work which concerns on Embodiment 1. FIG. The flowchart of the special cycle identification process which concerns on Embodiment 1. The block diagram of the maintenance plan generation apparatus 10 which concerns on modification 3. The block diagram of the maintenance plan generation apparatus 10 which concerns on Embodiment 2. FIG. The flowchart of the whole process of the maintenance plan generation apparatus 10 which concerns on Embodiment 2. FIG. The flowchart of the guideline charge calculation process which concerns on Embodiment 2.

Embodiment 1.
*** Explanation of configuration ***
The configuration of the maintenance plan generation device 10 according to the first embodiment will be described with reference to FIG.
The maintenance plan generator 10 is a computer.
The maintenance plan generator 10 includes hardware such as a processor 11, a memory 12, a storage 13, and a communication interface 14. The processor 11 is connected to other hardware via a signal line and controls these other hardware.

The processor 11 is an IC (Integrated Circuit) that performs processing. Specific examples of the processor 11 are a CPU (Central Processing Unit), a DSP (Digital Signal Processor), and a GPU (Graphics Processing Unit).

The memory 12 is a storage device that temporarily stores data. Specific examples of the memory 12 are SRAM (Static Random Access Memory) and DRAM (Dynamic Random Access Memory).

The storage 13 is a storage device for storing data. As a specific example, the storage 13 is an HDD (Hard Disk Drive). The storage 13 includes SD (registered trademark, Secure Digital) memory card, CF (CompactFlash, registered trademark), NAND flash, flexible disk, optical disk, compact disc, Blu-ray (registered trademark) disk, DVD (Digital Versaille Disk), and the like. It may be a portable recording medium.

The communication interface 14 is an interface for communicating with an external device. As a specific example, the communication interface 14 is a port of Ethernet (registered trademark), USB (Universal Serial Bus), HDMI (registered trademark, High-Definition Multimedia Interface).

The maintenance plan generation device 10 includes a standard cycle identification unit 21, a special cycle identification unit 22, an extension cycle identification unit 23, and a maintenance plan generation unit 24 as functional components. The functions of each functional component of the maintenance plan generator 10 are realized by software.
The storage 13 stores a program that realizes the functions of each functional component of the maintenance plan generation device 10. This program is read into the memory 12 by the processor 11 and executed by the processor 11. As a result, the functions of each functional component of the maintenance plan generation device 10 are realized.

In FIG. 1, only one processor 11 was shown. However, the number of processors 11 may be plural, and the plurality of processors 11 may execute programs that realize each function in cooperation with each other.

*** Explanation of operation ***
The operation of the maintenance plan generation device 10 according to the first embodiment will be described with reference to FIGS. 2 to 8.
The operation of the maintenance plan generation device 10 according to the first embodiment corresponds to the maintenance plan generation method according to the first embodiment. Further, the operation of the maintenance plan generation device 10 according to the first embodiment corresponds to the processing of the maintenance plan generation program according to the first embodiment.

In the first embodiment, an elevator will be used as a specific example of a product in which special parts are used. However, the products using special parts are not limited to elevators, and may be other products such as escalators and machine tools. However, as will be described later, in order to extend the maintenance work cycle by introducing remote maintenance, the maintenance plan generator 10 according to the first embodiment is generally maintained remotely like an elevator. It is especially effective for typical products.
Here, a part that is widely and generally used and has a usage record of more than the actual standard is called a standard part, and a part other than the standard part whose usage record is less than the actual standard is called a special part. Here, parts that have a track record of using similar parts that differ only in color or size are also referred to as standard parts. Here, the usage record includes the inspection or adjustment work performed on the part, the record of abnormality response and component replacement, and the information on the device state obtained by remote monitoring. The performance standard is a value determined according to the accuracy of performing the state standard maintenance. That is, if the accuracy of the state standard maintenance may be low, the actual standard will be a low value, and if the accuracy of the state standard maintenance needs to be high, the actual standard will be a high value.
The special parts include, as shown in FIG. 2, a part for connecting to an external system such as a security system, and as shown in FIG. 3, a part having a special size or a special design installed in the car. There is something.

The overall processing of the maintenance plan generation device 10 according to the first embodiment will be described with reference to FIG.
(Step S11: Standard cycle specifying process)
The standard cycle specifying unit 21 specifies, as a standard cycle, a cycle of maintenance work that realizes a reference maintenance level for standard parts that have been used more than the actual standard among the component parts constituting the elevator that is a product.
At this time, the standard cycle specifying unit 21 specifies the standard cycle by state-based maintenance using the past usage record data of the standard component.

(Step S12: Special cycle identification process)
The special cycle specifying unit 22 specifies, as a special cycle, a cycle of maintenance work that realizes a reference maintenance level for special parts other than standard parts among the component parts constituting the elevator that is a product.
At this time, the special cycle specifying unit 22 may specify the special cycle based on the result of the risk analysis, and if the maintenance work cycle is determined by the manufacturer of the special parts or the like, the cycle is specified. May be specified as a special period.

(Step S13: Period determination process)
The extension cycle specifying unit 23 determines whether or not the special cycle specified in step S12 is shorter than the standard cycle specified in step S11.
When the special cycle is shorter than the standard cycle, the extension cycle specifying unit 23 advances the process to step S14. On the other hand, when the special cycle is equal to or longer than the standard cycle, the extension cycle specifying unit 23 advances the process to step S16.

(Step S14: Extension determination process)
Whether or not the extension cycle specifying unit 23 can set the cycle for achieving the reference maintenance level to be longer than the special cycle specified in step S12 when remote maintenance is introduced for the special part. Is determined. Remote maintenance includes remote disconnection, which remotely disconnects the special part from the operation of the product when a defect occurs in the special part, and remote monitoring, which monitors the operation of the special part remotely. For example, as for remote maintenance of the connection component, which is a special component shown in FIG. 2, as shown in FIG. 5, a network of a remote monitoring center is provided between the connection component and the control panel of the elevator. A form in which a communication device for connecting is provided is conceivable. Note that FIG. 5 shows a mode in which remote maintenance is realized by using the network of the existing remote monitoring center. However, remote maintenance may be realized by using a network such as LTE (Long Term Evolution, registered trademark) instead of using the existing network of the remote monitoring center.
If the extension cycle specifying unit 23 can have a long cycle, the process proceeds to step S15. On the other hand, the extension cycle specifying unit 23 advances the process to step S16 when it is impossible to make the cycle long.

(Step S15: Extension cycle specifying process)
The extension cycle specifying unit 23 specifies as an extension cycle a cycle that realizes a reference maintenance level when remote maintenance is introduced.

(Step S16: Maintenance plan generation process)
The maintenance plan generation unit 24 generates a maintenance plan based on any one of the standard cycle specified in step S11, the special cycle specified in step S12, and the extension cycle specified in step S13.
Specifically, the maintenance plan generation unit 24 generates a maintenance plan using the shorter cycle of the standard cycle and the special cycle or the extension cycle. For example, the maintenance plan generation unit 24 generates a maintenance plan in which the maintenance work cycle is one year when the standard cycle is two years and the special cycle or extension cycle is one year. At this time, the maintenance plan generation unit 24 may inspect the standard parts every year but replace them every two years, and may replace the special parts every year. When there are a plurality of standard parts, the replacement cycle may be determined for each standard part. Similarly, when there are a plurality of special parts, the replacement cycle may be determined for each special part. Here, instead of setting the maintenance cycle for the entire elevator, the maintenance cycle may be set for each work unit such as a work position where it is efficient to work at the same time.

The standard cycle specifying process (step S11 in FIG. 4) according to the first embodiment will be described with reference to FIG.

(Step S21: Data collection process)
The standard cycle specifying unit 21 collects usage record data.
Specifically, the standard cycle specifying unit 21 searches from the storage device in which the usage record data is accumulated, using the attributes of the site where the elevator, which is a product, is mounted, the model number of the standard component, and the like as keywords. The standard cycle specifying unit 21 writes the usage record data that hits the search to the memory 12.

(Step S22: Life distribution specifying process)
The standard cycle specifying unit 21 specifies the life distribution of the standard component based on the usage record data collected in step S21.
Specifically, the standard cycle specifying unit 21 reads the usage record data from the memory 12. The standard cycle specifying unit 21 identifies the timing at which the standard component fails from the usage record data. The standard cycle specifying unit 21 specifies the distribution of the period from the start of use of the standard component to the specified timing as the life distribution of the standard component. The standard cycle specifying unit 21 writes the specified life distribution to the memory 12.

(Step S23: Monitoring determination process)
The standard cycle specifying unit 21 determines whether or not the effect of introducing the remote monitoring for remotely monitoring the operation of the standard component exceeds the cost of introducing the remote monitoring.
If the effect of introducing the remote monitoring exceeds the cost of introducing the remote monitoring, the standard cycle specifying unit 21 advances the process to step S24. On the other hand, if the effect of introducing the remote monitoring does not exceed the cost of introducing the remote monitoring, the standard cycle specifying unit 21 proceeds to the process in step S25.

By introducing remote monitoring, it may be possible to extend the maintenance work cycle. That is, if the sign of failure can be identified by monitoring the state of the standard component by remote monitoring, the maintenance work can be extended for a certain period of time while there is no sign of failure. The effect of introducing remote monitoring means the cost of maintenance work for a certain reference period, which is reduced by extending the maintenance work cycle. In other words, determining whether the effect of introducing remote monitoring exceeds the cost of introducing remote monitoring means that the cost of maintenance work reduced when introducing remote monitoring is the cost of introducing remote monitoring. Is to determine whether or not it exceeds.

As a specific example, the cost of introducing remote monitoring and the extension period of the maintenance work cycle are stored in the storage 13 in advance for each device configuration of remote monitoring. The standard cycle specifying unit 21 reads out the cost and the extension period from the storage 13 for each device configuration, and calculates the cost of maintenance work to be reduced when remote monitoring is introduced based on the extension period. Then, the standard cycle specifying unit 21 determines whether or not the effect of introducing the remote monitoring exceeds the cost of introducing the remote monitoring for each device configuration.
When the effect of introducing remote monitoring exceeds the cost of introducing remote monitoring in a plurality of device configurations, the standard cycle specifying unit 21 introduces the effect of introducing remote monitoring and the cost of introducing remote monitoring. It is decided to introduce the device configuration with the largest difference from.

(Step S24: First standard cycle determination process)
When remote monitoring is introduced, the standard cycle specifying unit 21 determines the cycle of maintenance work that realizes the reference maintenance level as the standard cycle.
A specific description will be given with reference to FIG. 7. Here, it is assumed that the failure occurrence rate is almost 0 as the reference maintenance level. When the life distribution is specified as shown in FIG. 7, the period 32, which is somewhat longer than the period 31 until the failure of the standard component starts to occur, is the standard maintenance level when remote monitoring is introduced. It will be the cycle of maintenance work to be realized. For example, if the period 31 is one year, the period 32 is one and a half years or the like. Even before the period 32, after the period 31 has elapsed, a failure of the standard component may occur. With regard to this failure, the precursor of the failure is identified by remote monitoring, and maintenance work is performed when the precursor appears.

(Step S25: Second standard cycle determination process)
The standard cycle specifying unit 21 determines the cycle of maintenance work that realizes the reference maintenance level as the standard cycle when remote monitoring is not introduced.
A specific description will be given with reference to FIG. 7. When the life distribution is specified as shown in FIG. 7, the period 31 until the failure of the standard component starts to occur is the maintenance work cycle that realizes the standard maintenance level when remote monitoring is introduced. become. This makes it possible to suppress the failure rate of standard parts to almost zero.

(Step S26: Standard cost identification process)
The standard cycle specifying unit 21 specifies the maintenance cost for the reference period when the maintenance work is performed in the standard cycle. The reference period is, for example, a period of 10 years. As a specific example, the cost of one maintenance work for a standard component is stored in the storage 13 in advance. The standard cycle specifying unit 21 divides the reference period by the standard cycle to calculate the number of maintenance operations in the reference period. Then, the standard cycle specifying unit 21 multiplies the number of maintenance works by the cost of one maintenance work to specify the maintenance cost for the reference period.
Further, when the standard cycle is specified in step S24, the standard cycle specifying unit 21 specifies the cost for introducing remote monitoring. As a specific example, the introduction cost of the device for remotely monitoring the standard parts is stored in the storage 13 for each type of building. The standard cycle specifying unit 21 specifies the cost for introducing remote monitoring by reading the introduction cost according to the type of the building into which the elevator as a product is introduced from the storage 13.
Then, when the standard cycle is specified in step S24, the standard cycle specifying unit 21 specifies the total of the maintenance cost and the cost for introducing the remote monitoring as the cost for the standard component. Further, when the standard cycle is specified in step S25, the standard cycle specifying unit 21 treats the maintenance cost as the cost for the standard component.

When there are a plurality of standard parts, the standard cycle specifying unit 21 specifies the life distribution for each standard part in step S22. Then, in step S24 and step S25, the standard cycle specifying unit 21 specifies the cycle of maintenance work that realizes the maintenance level as a reference for each standard component, and specifies the shortest cycle as the standard cycle.
Further, in this case, the cost of one maintenance work for each standard part is stored in the storage 13 in advance. Then, in step S26, the standard cycle specifying unit 21 specifies the maintenance cost for the reference period for all the standard parts by totaling the maintenance costs for the reference period for each standard part.

With reference to FIG. 8, the processes from the special cycle identification process (step S12 in FIG. 4) to the extension cycle identification process (step S15 in FIG. 4) according to the first embodiment will be described.
In FIG. 8, the processes from step S31 to steps S33 and S39 correspond to the processes in step S12 of FIG. Further, the process of step S34 corresponds to the process of step S13 of FIG. Further, the processes of steps S35 and S36 correspond to the processes of step S14 of FIG. Further, the processes from step S37 to steps S38 and S40 correspond to the processes of step S15 in FIG.

(Step S31: Impact determination process)
The special cycle specifying unit 22 determines whether or not the operation of the elevator, which is a product, is affected when a special component fails.
Specifically, the range of influence when a special component fails is stored in the storage 13 in advance. The special cycle specifying unit 22 reads the influence range from the storage 13 and determines whether or not the operation of the elevator is affected by whether or not the operation of the elevator is included in the influence range.
If the operation of the elevator, which is a product, is not affected, the special cycle specifying unit 22 proceeds to the process in step S32. On the other hand, if the special cycle specifying unit 22 affects the operation of the elevator, which is a product, the process proceeds to step S33.

(Step S32: First special cycle identification process)
The special cycle specifying unit 22 specifies the standard cycle specified in step S11 as a special cycle which is a cycle of maintenance work for realizing a maintenance level based on a special part.
In other words, if there is no effect on the operation of the elevator, which is a product, we do not dare to perform maintenance work only for special parts, but when performing maintenance work for standard parts, we also perform maintenance work for special parts. Try to do it.

(Step S33: Second special cycle identification process)
The special cycle specifying unit 22 identifies the special cycle based on the result of risk analysis. Alternatively, the special cycle specifying unit 22 specifies the cycle of maintenance work as a special cycle when the cycle of maintenance work is determined by the manufacturer of the special part or the like.
When the special cycle identification unit 22 specifies the special cycle based on the result of the risk analysis, for example, the failure mode of the special component is analyzed by FTA (Fault Tree Analysis), so that the special cycle can be identified. Identify the risk of failure. Failure risk indicates the degree and frequency of failure. Then, the special cycle specifying unit 22 specifies a cycle according to the risk of failure as a special cycle. For example, the special cycle is stored in the storage 13 in advance according to the risk of failure, and the special cycle specifying unit 22 reads the cycle corresponding to the risk of failure from the storage 13 to set the special cycle. Identify.

(Step S34: Period determination process)
The extension cycle specifying unit 23 determines whether or not the special cycle specified in step S33 is shorter than the standard cycle specified in step S11 of FIG.
When the special cycle is shorter than the standard cycle, the extension cycle specifying unit 23 advances the process to step S35. On the other hand, when the special cycle is equal to or longer than the standard cycle, the extension cycle specifying unit 23 advances the process to step S39.

(Step S35: Separation determination process)
The extension cycle specifying unit 23 determines whether or not the effect of introducing the remote isolation exceeds the cost of introducing the remote isolation.
If the effect of introducing the remote isolation exceeds the cost of introducing the remote isolation, the extension cycle specifying unit 23 advances the process to step S37. On the other hand, if the effect of introducing the remote isolation does not exceed the cost of introducing the remote isolation, the extension cycle specifying unit 23 proceeds to the process in step S36.

By introducing remote isolation, it becomes possible to separate the failed special part from the operation of the elevator, which is a product. By separating the special parts from the operation of the elevator, the special parts do not affect the operation of the elevator, so that it may be possible to postpone the maintenance work of the special parts.
For example, the special component may be a function of receiving an operation signal from an external system or a dedicated operation switch. In this case, even if the special parts cannot be used, the operation of the elevator, which is a product, is not affected. However, it is possible that the elevator may operate unexpectedly due to the malfunctioning special component transmitting an erroneous operation signal to the elevator. Therefore, this special part cannot be left in a broken state, and maintenance work must be performed immediately. However, if this special component can be separated from the operation of the elevator, it is possible to continue using the elevator without immediately performing maintenance work. By separating the special parts from the operation of the elevator in this way, it may be possible to postpone the maintenance work of the special parts.
The effect of introducing remote isolation means the cost of maintenance work during the reference period, which is reduced by extending the maintenance work cycle. In other words, determining whether the effect of introducing remote isolation exceeds the cost of introducing remote isolation means that the cost of maintenance work during the reference period, which is reduced when remote isolation is introduced, is determined. It is to determine whether the cost of introducing remote isolation is exceeded.

As a specific example, as in step S23 of FIG. 6, the cost of introducing the remote separation and the extension period of the maintenance work cycle are stored in the storage 13 in advance for each device configuration of the remote separation. .. The extension cycle specifying unit 23 reads out the cost and the extension period from the storage 13 for each device configuration, and calculates the cost of maintenance work to be reduced when remote isolation is introduced based on the extension period. Then, the extension cycle specifying unit 23 determines whether or not the effect of introducing the remote isolation exceeds the cost of introducing the remote isolation for each device configuration.
When the effect of introducing remote isolation exceeds the cost of introducing remote isolation in a plurality of device configurations, the extension cycle specifying unit 23 has the effect of introducing remote isolation and remote isolation. It is decided to introduce the equipment configuration that has the largest difference from the cost of introducing.

(Step S36: Monitoring determination process)
The extension cycle specifying unit 23 determines whether or not the effect of introducing the remote monitoring for remotely monitoring the operation of the special component exceeds the cost of introducing the remote monitoring.
If the effect of introducing the remote monitoring exceeds the cost of introducing the remote monitoring, the extension cycle specifying unit 23 advances the process to step S38. On the other hand, if the effect of introducing the remote monitoring does not exceed the cost of introducing the remote monitoring, the extension cycle specifying unit 23 proceeds to the process in step S39.

Even if the remote monitoring is introduced here, it is not possible to obtain the life distribution as shown in FIG. 7 for special parts. However, if the change in the state can be grasped by remote monitoring, the work cycle can be extended according to the state.

(Step S37: First extension cycle specifying process)
When the remote separation is introduced, the extension cycle specifying unit 23 determines the cycle of maintenance work that realizes the reference maintenance level as the extension cycle.
Specifically, the extension cycle specifying unit 23 specifies, as an extension cycle, a cycle that is somewhat longer than the special cycle specified in step S33, based on the same idea as in step S24 of FIG. Alternatively, the extension cycle specifying unit 23 specifies the standard cycle specified in step S11 as an extension cycle, which is a cycle of maintenance work that realizes a maintenance level based on the special component, as in step S32.

(Step S38: Second extension cycle specifying process)
When remote monitoring is introduced, the extension cycle specifying unit 23 determines the cycle of maintenance work that realizes the reference maintenance level as the extension cycle.
Specifically, the extension cycle specifying unit 23 specifies, as an extension cycle, a cycle that is somewhat longer than the special cycle specified in step S33, based on the same idea as in step S24 of FIG.

(Step S39: Special cost identification process)
The special cycle specifying unit 22 specifies the maintenance cost for the reference period when the maintenance work is performed in the special cycle. As a specific example, the cost of one maintenance work for a special part is stored in the storage 13 in advance. The special cycle specifying unit 22 calculates the number of maintenance operations in the reference period by dividing the reference period by the special cycle. Then, the special cycle specifying unit 22 multiplies the number of maintenance works by the cost of one maintenance work to specify the maintenance cost for the reference period. The special cycle specifying unit 22 specifies the maintenance cost for the reference period as the cost for the special part.

(Step S40: Extension cost identification process)
The extension cycle specifying unit 23 identifies the cost for introducing remote isolation or remote monitoring. As a specific example, the introduction cost of the device for remote isolation or remote monitoring is stored in the storage 13 for each type of building. The extension cycle specifying unit 23 specifies the cost for introducing remote isolation or remote monitoring by reading the introduction cost according to the type of the building into which the elevator as a product is introduced from the storage 13.
Then, the extension cycle specifying unit 23 calculates the maintenance cost for the reference period in the same manner as in step S39, and specifies the total of the maintenance cost and the cost for introducing the remote monitoring as the cost for the special part.

*** Effect of Embodiment 1 ***
As described above, the maintenance plan generator 10 according to the first embodiment realizes a maintenance level when remote maintenance is introduced for special parts when the special cycle is shorter than the standard cycle. The cycle of maintenance work to be performed is specified as an extension cycle. Then, the maintenance plan generation device 10 generates a maintenance plan based on either a standard cycle, a special cycle, or an extension cycle. This makes it possible to appropriately generate a maintenance plan for a product using special parts.

In particular, the maintenance plan generator 10 according to the first embodiment examines the extension cycle when remote isolation is introduced. Therefore, due to the characteristics of special parts, it may be possible to extend the maintenance work cycle to the same extent as the standard cycle when it can be separated from the operation of products such as elevators.

*** Other configurations ***
<Modification example 1>
In the first embodiment, it has been described that the usage record data is simply collected in step S21 of FIG. However, it is possible to distinguish between the case where there is usage record data for the target standard part and the case where there is only usage record data for similar parts similar to the target standard part.
Specifically, when there is usage record data for the target standard component, as in the first embodiment, the usage record data is collected in step S21 of FIG. 6, and the life distribution is calculated in step S22. .. On the other hand, when there is only usage record data of similar parts, the standard cycle specifying unit 21 in step S21 of FIG. 6 obtains usage record data of similar parts and verification experiment data of the target standard parts. collect. The purpose of collecting verification experiment data is to more accurately identify the life distribution by increasing the amount of data on which it is based. Then, in step S22 of FIG. 6, the standard cycle specifying unit 21 estimates the life distribution based on the usage record data of similar parts and the verification experiment data. At this time, the standard period specifying unit 21 specifies the estimation accuracy based on the amount of data as a basis and the degree of similarity of similar parts. The degree of similarity between similar parts can be specified by storing the degree of similarity between parts in the storage 13 in advance. The standard cycle specifying unit 21 corrects the life distribution so that the life is shortened based on the estimation accuracy. Specifically, the standard cycle specifying unit 21 corrects so that the lower the estimation accuracy, the shorter the life.

<Modification 2>
In the process shown in FIG. 8, either remote isolation or remote monitoring was introduced as remote maintenance. However, if it is possible to postpone maintenance work for a longer period of time by introducing both remote isolation and remote monitoring, both remote isolation and remote monitoring may be introduced.

<Modification example 3>
At the time of installing the elevator, even if the parts are treated as special parts with little usage record, the usage record will accumulate more than the actual standard as the elevator continues to be used. Therefore, when the process shown in FIG. 4 is periodically executed and the standard part and the special part are reclassified at the time of executing the process, the part previously treated as a special part is treated as a standard part. There is. This makes it possible to generate a more appropriate maintenance plan.
Depending on the part, the manufacturer of the part may be responsible for the quality. At this time, if the failure record data of a single unit can be obtained from the manufacturer or the like, even if the usage record is less than the actual standard, it may be treated as a standard part instead of a special part.

<Modification example 4>
If the product is an elevator, the building owner may install special parts without the involvement of the elevator manufacturer and the maintenance company. In this case, although the part is generally excluded from the maintenance contract, if it is installed in such a way that the operation of the elevator is controlled by a signal from a special part, it should be ignored in the maintenance plan. I can't. In this case, it can be dealt with by regarding the installed parts as special parts with high risk and generating a maintenance plan by the process shown in FIG. For special parts with high risk, the special cycle is set short.

<Modification 5>
In the first embodiment, each functional component is realized by software. However, as a modification 5, each functional component may be realized by hardware. The difference between the modified example 5 and the first embodiment will be described.

The configuration of the maintenance plan generation device 10 according to the modification 5 will be described with reference to FIG.
When each functional component is implemented in hardware, the maintenance plan generator 10 includes an electronic circuit 15 in place of the processor 11, the memory 12, and the storage 13. The electronic circuit 15 is a dedicated circuit that realizes the functions of each functional component, the memory 12, and the storage 13.

Examples of the electronic circuit 15 include a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, a logic IC, a GA (Gate Array), an ASIC (Application Specific Integrated Circuit), and an FPGA (Field-Programmable Gate Array). is assumed.
Each functional component may be realized by one electronic circuit 15, or each functional component may be distributed and realized by a plurality of electronic circuits 15.

<Modification 6>
As a modification 6, some functional components may be realized by hardware, and other functional components may be realized by software.

The processor 11, the memory 12, the storage 13, and the electronic circuit 15 are referred to as processing circuits. That is, the function of each functional component is realized by the processing circuit.

Embodiment 2.
The second embodiment is different from the first embodiment in that the maintenance level is lowered and the maintenance plan is regenerated when the cost for implementing the generated maintenance plan is higher than the standard cost. In the second embodiment, these different points will be described, and the same points will be omitted.

*** Explanation of configuration ***
The configuration of the maintenance plan generation device 10 according to the second embodiment will be described with reference to FIG.
The maintenance plan generation device 10 is different from the maintenance plan generation device 10 shown in FIG. 1 in that it includes a level determination unit 25 and a cost determination unit 26 as functional components.

*** Explanation of operation ***
The operation of the maintenance plan generation device 10 according to the second embodiment will be described with reference to FIGS. 11 to 12.
The operation of the maintenance plan generation device 10 according to the second embodiment corresponds to the maintenance plan generation method according to the second embodiment. Further, the operation of the maintenance plan generation device 10 according to the second embodiment corresponds to the processing of the maintenance plan generation program according to the second embodiment.

The overall processing of the maintenance plan generation device 10 according to the second embodiment will be described with reference to FIG.
The processing of steps S43 to S48 is the same as the processing of steps S11 to S16 of FIG.

(Step S41: Estimated charge calculation process)
The level determination unit 25 calculates an estimate of the maintenance cost for the maintenance of the elevator based on the information such as the profit status and importance of the building in which the elevator, which is a product, is installed.

(Step S42: Maintenance level determination process)
The level determination unit 25 determines the standard maintenance level based on the guideline of the maintenance cost calculated in step S41 and the intention of the building owner.
The intention of the building owner is, for example, to raise the maintenance level, to achieve an average maintenance level, or to reduce maintenance costs. When the level determination unit 25 intends to raise the maintenance level, the level determination unit 25 determines that the maintenance level is based on a maintenance level slightly higher than the maintenance level specified from the standard maintenance cost. Further, when the level determination unit 25 intends to reduce the maintenance cost, the level determination unit 25 determines the maintenance level based on the maintenance level slightly lower than the maintenance level specified from the guideline of the maintenance cost. The maintenance level at this time is a content that does not affect the safety of the user, and mainly targets the stop time, riding comfort, and the like.
The maintenance level specified from the guideline of the maintenance cost can be specified by storing the maintenance level corresponding to each maintenance cost in the storage 13 in advance.

(Step S49: Cost determination process)
The cost determination unit 26 determines whether or not the cost for implementing the maintenance plan generated in step S48 is higher than the reference cost. The reference cost is an amount obtained by adding or subtracting a correction amount to the standard maintenance cost calculated in step S41 or the standard maintenance cost.
If the cost for implementing the maintenance plan is higher than the reference cost, the cost determination unit 26 proceeds to step S50. On the other hand, the cost determination unit 26 ends the process when the cost for implementing the maintenance plan is not higher than the standard cost.

(Step S50: Maintenance level review process)
The cost determination unit 26 sets a maintenance level lower than the current standard maintenance level as a new standard maintenance level. For example, the cost determination unit 26 sets the maintenance level one level lower than the current standard maintenance level as the new standard maintenance level.
Then, the cost determination unit 26 advances the process to step S43 and causes the maintenance plan to be regenerated.

The guideline charge calculation process (step S41 in FIG. 11) according to the second embodiment will be described with reference to FIG.
(Step S51: Building identification process)
The level determination unit 25 switches the processing according to the type of the building in which the elevator, which is a product, is installed. Specifically, the level determination unit 25 causes the building type to be input, and switches the processing according to the input building type.
Here, when the type of the building is any of office, residential, and commercial facility, the level determination unit 25 proceeds to step S52. When the type of the building is an accommodation facility, the level determination unit 25 proceeds to step S53. When the type of the building is either a public facility or a medical facility, the level determination unit 25 proceeds to step S54. When the building type is a transportation facility, the level determination unit 25 proceeds to step S55.

(Step S52: First value estimation process)
The level determination unit 25 specifies the annual rent per unit area according to the location of the building. Specifically, the level determination unit 25 acquires the rent of the building location from an external server that stores the annual rent per unit area for each location. The level determination unit 25 identifies the rent of the entire building, which is calculated by multiplying the acquired rent by the size of the building, as the annual production value of the building.
The size of the building may be the total floor area of the building, or may be the floor area of the area to be rented if the floor area of the area to be rented is known.

(Step S53: Second value estimation process)
The level determination unit 25 acquires transaction information for the last year of the building from the reservation system of the accommodation facility. The level determination unit 25 calculates the accommodation fee for the latest year of the building from the transaction information, and specifies the accommodation fee for the latest year as the annual production value of the building.

(Step S54: Third value estimation process)
The level determination unit 25 calculates the loss per unit time when the elevator, which is a product, is stopped. Specifically, the loss is stored in the storage 13 in advance for each possible event. For example, in a hospital where a serious patient is hospitalized, if all elevators are stopped, emergency surgery cannot be performed, which may affect human life. If such an event occurs, it will result in a very large loss. The level determination unit 25 calculates the probability that each event occurs in a unit time by risk analysis, and calculates the loss per unit time by summing the amount obtained by multiplying the probability and the loss for each event. Then, the level determination unit 25 calculates the annual loss from the loss per unit time, and identifies the annual loss as the annual production value of the building.
The annual loss may not be used as it is as the annual production value of the building, but the annual loss may be multiplied by some correction factor to obtain the annual production value of the building. For example, if there are a plurality of elevators and they can be replaced by other elevators, they may be corrected so as to reduce the loss.

(Step S55: Fourth value estimation process)
The level determination unit 25 acquires the annual number of users and the average usage amount from an external server that manages information on transportation facilities. The level determination unit 25 specifies the amount obtained by multiplying the annual number of users by the average usage amount as the annual production value of the building.

(Step S56: Maintenance cost calculation process)
The level determination unit 25 calculates the estimated amount of cost for elevator maintenance by multiplying the annual production value of the building specified in any of steps S52 to S55 by the reference ratio.
The reference ratio is a predetermined value. The reference ratio is generally specified, for example, by examining the ratio of the cost of maintaining an elevator to the annual production value of a building.

*** Effect of Embodiment 2 ***
As described above, the maintenance plan generation device 10 according to the second embodiment lowers the maintenance level and reproduces the maintenance plan when the cost for implementing the generated maintenance plan is higher than the standard cost. Make up. This makes it possible to generate a maintenance plan with a reasonable amount of money.

Even if the maintenance plan is optimized for special parts, the maintenance plan does not always have a reasonable amount of money compared to the budget of the building owner. Proposing a maintenance plan that is not reasonable compared to the budget to the building owner will increase the possibility that it will take time to conclude the contract or that it will be changed to another maintenance company. However, since the maintenance plan generation device 10 according to the second embodiment can generate a maintenance plan of a reasonable amount of money, it is possible to prevent such a situation.

*** Other configurations ***
<Modification 7>
As the building ages, its market value may decline and its profits may decline. In that case, the standard maintenance cost will also decrease. Therefore, the maintenance plan generation device 10 may periodically execute the process shown in FIG. 11 to regenerate the maintenance plan.
At this time, the maintenance plan generation unit 24 may include the maintenance cost for the standard part and the maintenance cost for the special part in the maintenance plan. The maintenance cost for the standard part is the cost calculated in step S26 of FIG. The maintenance cost for the special part is the cost calculated in step S39 or step S40 of FIG.
In addition, the maintenance plan generation unit 24 calculates the ratio of the maintenance cost for the special part to the total of the maintenance cost for the standard part and the maintenance cost for the special part. Then, when this ratio exceeds the threshold value, the maintenance plan generation unit 24 may notify the separation of the special parts. In other words, if the ratio of the maintenance cost of special parts to the total maintenance cost is high, it may not be desirable from the viewpoint of maintaining the value of the elevator to continue using the special parts. Therefore, the separation of special parts is notified.

10 Maintenance plan generator, 11 Processor, 12 Memory, 13 Storage, 14 Communication interface, 15 Electronic circuit, 21 Standard cycle identification unit, 22 Special cycle identification unit, 23 Extension cycle identification unit, 24 Maintenance plan generator, 25 Level determination Department, 26 Cost Judgment Department, 31 period, 32 period.

Claims (10)

For standard parts that have been used more than the actual standard among the component parts that make up the product, a standard cycle identification unit that specifies the maintenance work cycle that achieves the standard maintenance level as the standard cycle, and
For special parts other than the standard parts among the component parts, a special cycle specifying unit that specifies the cycle of maintenance work that realizes the maintenance level as a special cycle, and
When remote maintenance is introduced for the special part when the special cycle specified by the special cycle specifying unit is shorter than the standard cycle specified by the standard cycle specifying unit. An extension cycle specifying unit that specifies the maintenance work cycle that achieves the maintenance level as an extension cycle,
A maintenance plan generation device including a maintenance plan generation unit that generates a maintenance plan based on the standard cycle, the special cycle, and the extension cycle specified by the extension cycle identification unit. The maintenance plan generation device according to claim 1, wherein the standard cycle specifying unit specifies the standard cycle based on a failure record in the usage record of the standard component. As the remote maintenance, the extension cycle specifying unit remotely separates the special part from the operation of the product when a defect occurs in the special part, and remotely monitors the operation of the special part. The maintenance plan generation device according to claim 1 or 2, which specifies the extension cycle when at least one of the remote monitoring is introduced. The maintenance plan generation unit adds the introduction cost of remote maintenance to the maintenance cost of the reference period when the extension cycle is adopted, rather than the maintenance cost of the reference period when the special cycle is adopted. The maintenance plan generation device according to any one of claims 1 to 3, wherein when the total cost is smaller, the extension cycle is adopted instead of the special cycle to generate the maintenance plan. The maintenance plan generator further
If the cost of implementing the maintenance plan generated by the maintenance plan generation unit is higher than the reference cost, the request is provided with a cost determination unit for lowering the maintenance level and regenerating the maintenance plan. The maintenance plan generator according to any one of items 1 to 4. The maintenance plan generator according to claim 5, wherein the reference cost is determined based on at least one of the production value of the product and the loss due to the suspension of the product. The maintenance plan generation unit has claims 1 to 6 for notifying the separation of the special parts when the ratio of the costs for the special parts exceeds the threshold value in the costs for implementing the maintenance plan. The maintenance plan generator according to any one of the above items. When the usage record of the special component exceeds the threshold value, the standard cycle specifying unit treats the special component as a standard component and respecifies the standard cycle.
The maintenance plan generation device according to any one of claims 1 to 7, wherein the maintenance plan generation unit generates a maintenance plan based on the respecified standard cycle. The standard cycle identification unit specifies the maintenance work cycle that achieves the standard maintenance level as the standard cycle for standard parts that have been used more than the actual standard among the component parts that make up the product.
The special cycle specifying unit specifies the cycle of maintenance work that achieves the maintenance level as a special cycle for special parts other than the standard parts among the component parts.
Extension cycle When the special cycle is shorter than the standard cycle, the maintenance work cycle is extended to achieve the maintenance level when remote maintenance is introduced for the special part. Specified as
A maintenance plan generation method in which the maintenance plan generation unit generates a maintenance plan based on the standard cycle, the special cycle, or the extension cycle. The standard cycle specification process specifies the maintenance work cycle that achieves the standard maintenance level for standard parts that have been used more than the actual standard among the component parts that make up the product.
A special cycle specifying process in which the special cycle specifying unit specifies the cycle of maintenance work for achieving the maintenance level as a special cycle for special parts other than the standard parts among the constituent parts.
When the extension cycle specifying unit has a shorter cycle of the special cycle specified by the special cycle specifying process than the standard cycle specified by the standard cycle specifying process, the special component is remotely controlled. Extension cycle specification processing that specifies the cycle of maintenance work that achieves the maintenance level as an extension cycle when maintenance is introduced, and
As a maintenance plan generation device, the maintenance plan generation unit performs a maintenance plan generation process for generating a maintenance plan based on the standard cycle, the special cycle, and the extension cycle specified by the extension cycle identification process. A maintenance plan generator that makes your computer work.

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